20" Lightweight M-Lok Rifle kit

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PSA 20" Rifle-Length 6.5 Grendel 1/8 Stainless Steel 15" Lightweight M-Lok MOE 2-Stage Precision Rifle Kit - 5165450138


Quick Overview

free shipping Free Shipping applies to this item only and not the entire order.

WARNING: This product can expose you to the chemical lead, which is known to the State of California to cause cancer and reproductive harm. For more information go to www.p65warnings.ca.gov (CA Health and Safety Code Section 25249.6).

SKU: 5165450138
UPC: 5165450138
MFR#: 5165450138
  • Barrel Length: 20"
  • Gas System: Rifle-length
  • Barrel Profile: A2 Style
  • Barrel Steel: 416R
  • Barrel Finish: Stainless Steel
  • Chrome Lining: None
  • Muzzle Thread: 5/8-24
  • Chamber: 6.5 Grendel; Type 2
  • Twist Rate: 1:8
  • Barrel Extension: M4
  • Diameter at Gas Block: .750
  • Gas Block Type: Low profile adjustable gas block
  • Muzzle Device: A2 Flash Hider
  • Receiver Material: Forged 7075 T6
  • Receiver Type: M4
  • Handguard Type: PSA 15" Lightweight M-Lok Free Float Rail
  • Bolt Carrier Group Included: Yes
  • Bolt Steel: 9310, Nitride Coated
  • Bolt Carrier Profile: Full-auto
  • Charging Handle Included: Yes
  • Build Kit: PSA MOE 2-Stage Lower Build Kit, Black
  • Overall Length: 24.5"
  • Weight as Configured: 4.2lbs

Add To:

Barrel: 416R Stainless steel. Chambered in 6.5 Grendel, with a 1:8 twist, M4 barrel extension, and a rifle-length gas system. The barrel is finished off with a PSA 15" Lightweight M-Lok free float rail, .750 adjustable gas block, and A2 flash hider.

Upper: Forged 7075-T6 A3 AR upper is machined to MIL-SPECS and hard coat anodized. These uppers are made for us right here in the USA by a mil-spec manufacturer.

Bolt: Full-auto profile bolt carrier group. 9310 steel bolt, Shot Peened, Gas Key Hardened to USGI Specifications, Fastened with Grade 8 screws, and Staked Per Mil-Spec. 8620 steel M-16 profile carrier is nitride treated.

Build Kit: PSA MOE 2-Stage Lower Build Kit, Black

SKU: 5165450138
SKU 5165450138
Brand Palmetto State Armory
Daily Deal No
Daily Deal Expires No
Youtube Video No
Free Shipping? Yes
Free Shipping Qty Label No
Free Shipping Qty No
SKU: 5165450138

Questions and Answers

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Browse 13 questions Browse 13 questions and 12 answers
Which barrel is used in this? Do you all make them in house?
Danny on Mar 2, 2019
BEST ANSWER: Maybe PSA will chime in here to verify this barrel is the one in the product pages below. I am not affiliated with PSA so this is just some dude on the internet answering you to the best of his ability.

Based on my recommendation my cousin purchased the PSA complete upper in 6.5 Grendel with a 20" SS barrel last fall. That thing shoots much, much better than my Odin Works 18" SS barrel in 6.5 Grendel with any ammo. Best I can tell PSA has started manufacturing their own barrels over the last several years. I have not seen one yet in any caliber (223/5.56, 6.5 Grendel, 6.5 Creedmoor, and 308) that does not shoot sub-MOA with good ammunition. Not super expensive "match grade" ammunition, just better than bulk ammo. The Hornady 6.5 Grendel ammo (Black, and Custom) is what we started with in this 6.5 Grendel barrel and have since developed hand loads that perform even better with several different projectiles and powders. During hand load development the largest group was 1.25 MOA, and minor adjustments to COL and powder charges quickly brought them down to 0.5 MOA. My cousin couldn't be happier with this barrel.
PSA 20
PSA 20" Rifle-Length 6.5 Grendel 1/8 Stainless Steel Barrel - 5165448708
PSA 20
PSA 20" Rifle-Length 6.5 Grendel 1/8 Stainless Steel 15" M-Lok Upper With BCG & CH
What are the general specs on the trigger group included with this build kit ?
Tim K on Feb 28, 2019
BEST ANSWER: As far as I can tell it's PSA's 2 stage trigger. Specs: SKU: 516447205
UPC: 516447205
MFR#: 516447205
Platform: AR-15/AR-10
Finish: Nickel Boron
Type: 2-Stage
First Stage Weight: 1.75lbs
Second Stage Weight: 1.75lbs
Total Pull Weight: 3.5lbs
Adjustable: No
Trigger Pins: Mil-Spec (2 qty)
Trigger Type: M4 Curved
PSA 2 Stage Nickel Boron Trigger Assembly - 516447205
PSA 2 Stage Nickel Boron Trigger Assembly - 516447205
Can it shoot steel case ammo?
Nick Nam on May 1, 2019
Is this a complete build kit or will other parts be required to have a full functional rifle?
Earl T on Apr 2, 2019
BEST ANSWER: Not a full rifle. You will need to purchase a ar15 lower from an ffl and assemble the lower yourself.
Is the barrel dimpled for the gas block?
Garrett G on Mar 27, 2019
BEST ANSWER: The gas block was installed and pinned in the kit I got.
Is this the Magpul moe lower or just a standard moe lower?
Joey F on Mar 2, 2019
BEST ANSWER: MOE stands for Magpul Original Equipment. All MOE parts, including the lower furniture parts in this kit, are Magpul parts.
What are the psa options for lowers to use with this 6.5 grendel kit ?
David E on Feb 12, 2019
BEST ANSWER: Any mil spec AR-15 pattern lower receiver.
Does it come with instructions to doe is come with instructions to build it ? And how many clips if any and how many rounds can fit in that clip ?
Sudaca on Mar 30, 2019
BEST ANSWER: No instructions however YouTube is your friend.

By “clip” I assume you mean magazine. It comes without magazines.
A stripped lower receiver is all I need to complete this rifle?
Brandon L on Mar 28, 2019
Will this kit work with a anderson lower ?
E P on Mar 1, 2019
BEST ANSWER: Yes, this kit will work with an Anderson lower. I have installed many PSA build kits on Anderson, PSA, Spikes, and Aero Precision AR-15 lowers. They have all installed and worked as intended without issue. The upper assembly is just as universal on all of those brand AR-15 lowers too.
Will this work with a Anderson lower?
E P on Mar 1, 2019
BEST ANSWER: Yes, any ar-15 lower
Can you get a commercial buffer tube and stock?
Russel E on Jan 30, 2019
Is it a rifle length buffer tube?
Burton P on Dec 28, 2018
BEST ANSWER: Based on the product picture this is a carbine buffer tube, spring, and buffer mass. The "rifle length" in the description is referring to the gas system length of the barrel.


4.8 / 5.0
12 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Great Hunting Rifle
I wanted to purchase a good hunting rifle that wasn't on the heavy AR10 platform. This 6.5 Grendel does the trick. I don't have any issue dropping hogs from 200 yards. It has plenty of knock down power with 1/3 of the recoil of the 308. Very glad a bought this. It is a little heavier then what I anticipated but, still nothing close to most AR10 builds. Great kit!
June 17, 2019
4 months ago
Great weapon but is cheap. Sub MOA all day long.
It love Speer Gold Dot 120gr. Using CFE223 powder. The rifle is well built and the only issue I had was it looks like there was a rail mounted to my gun then removed besides that 100% satisfied
June 4, 2019
3 months ago
Good kit for the price.
When I first received the kit I did a complete disassembly and reassembly to ensure it was assembled properly. I changed the flash hider and Buttstock, the rail is cheap which I expected when I placed the order. I may change out the rail in the near future. All of the other parts work great. Cycles flawlessly, I expect it will do infrequent trips to the range. Would be 5 stars if the Buttstock that came with it were not loosely fitted to the buffer tube and the rail was better quality that attached to more of a solid mount.
3 shot group at 100 yards using handloads. Exceeded my expectations.
Kit assembled with other parts added.
June 1, 2019
3 months ago
Haven’t had a problem sighted in pretty quick and enjoyed it ever sense
Love my 6.5 Grendel put a 6x24x50 vortex tactical fun gun will buy more in the future
Love my 6.5 Grendel put a 6x24x50 vortex tactical fun gun will buy more in the future
May 24, 2019
3 months ago
6.5 heaven? Maybe I got lucky
I wasn’t sure about this combo, my first 6.5.
I love it. It’s no 270 Win but I knew that going in. Steel, and heavy E Lander mags should make this run. I’m crossing my fingers and want it to be my varmint gun. Wolf ammo was single loaded before the mags came in and it shot extremely well on a very windy day.
Now to get back out there and run some SST through it at 100yds then keep going to check groups at 500.
May 22, 2019
3 months ago
Excellent product, shoots very well and its a a tack driver. Shipped very quickly and just ordered a 300 blackout.
May 16, 2019
4 months ago
Excellent bargain, very capable rifle. Eats Wolf with no issues.
Excellent bargain. Originally was disappointed with Hornady black groups - however, haven’t had a chance to try SST through it and I hear that load performs better in gas guns. What makes this upper an absolute win is it’s performance with Wolf. This is what’s going to be primarily run through this rifle as it’s 30¢ a round. Have put around 300 rounds of steel cased through it with zero issues. Consistently shoots 2-4 MOA, which is absolutely sufficient - especially when considering the value of this ammunition. I didn’t touch the gas block, as it goes bang every time and recoil is more than manageable. Bolt locks back on empty magazines. Very pleased with this kit, and having a 6.5 Grendel for the price paid is incredible. Very capable rifle.
Wolf 100 grain - 10 shot group at 200 yards
Wolf 100 grain - 5 shot group at 100 yards
May 5, 2019
3 months ago
Finally got a chance to throw a few rounds down range. Shoots great.
May 4, 2019
4 months ago
Excellent product!
Put this kit together and mounted a vortex scope on it. Consistent 1” groups with the largest group being about 1 1/2” with factory ammo but I know the spread was me and not this beauty. Very happy with the quality. Looking forward to using this rifle in the field.
User submitted image
Added Apr 28, 2019
April 28, 2019
4 months ago
Awesome rifle. Well manufactured nail driver.
User submitted image
Added Jan 31, 2019
January 31, 2019
7 months ago

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